PHYS-2211-A-SPRING24.903690020.2211HW3

Problem 6 (1 point) Three 5 kg masses are located at points in the x-y plane as shown in the figure. What is the magnitude of the resultant force (caused by the other two masses) on the mass at x = 0, y = 0.30 m? ( G = 6 . 67 × 10 − 11 Nm 2 /kg 2 ) • A. 2 . 5 × 10 − 8 N • B. 1 . 75 × 10 − 8 N • C. 2 . 3 × 10 − 8 N • D. 2 . 6 × 10 − 8 N • E. 1 . 9 × 10 − 8 N Problem 7 (1 point) In the following problems you will be asked to calculate the net gravitational force acting on the Moon. To do so, please use the following variables. Mass, Initial Position m Sun = m 1 , ⃗ r Sun = < 0 , 0 , 0 > m Earth = m 2 , ⃗ r Earth = < L, 0 , 0 > m Moon = m 3 , ⃗ r Moon = < L, h, 0 > Page 3

How much time does it take for Greco to hit the pool? s What should be the minimum length of the pool such that Dr. Greco can land safely in the water? m Determine Dr. Greco’s velocity ⃗v = v x ˆ x + v y ˆ y the instant he hits the water. Find the x and y components of his velocity (with appropriate algebraic sign + or - according to the figure above) v x = m/s v y = m/s Generated by WeBWorK, © The WeBWorK Project. openwebwork.org